SameBoy/Cocoa/NSImageNamedDarkSupport.m

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#import <AppKit/AppKit.h>
#import <objc/runtime.h>
@interface NSImageRep(PrivateAPI)
@property(setter=_setAppearanceName:) NSString *_appearanceName;
@end
static NSImage * (*imageNamed)(Class self, SEL _cmd, NSString *name);
@implementation NSImage(DarkHooks)
+ (NSImage *)imageNamedWithDark:(NSImageName)name
{
NSImage *light = imageNamed(self, _cmd, name);
if (@available(macOS 10.14, *)) {
NSImage *dark = imageNamed(self, _cmd, [name stringByAppendingString:@"~dark"]);
if (!dark) {
return light;
}
NSImage *ret = [[NSImage alloc] initWithSize:light.size];
for (NSImageRep *rep in light.representations) {
[rep _setAppearanceName:NSAppearanceNameAqua];
[ret addRepresentation:rep];
}
for (NSImageRep *rep in dark.representations) {
[rep _setAppearanceName:NSAppearanceNameDarkAqua];
[ret addRepresentation:rep];
}
return ret;
}
return light;
}
+(void)load
{
if (@available(macOS 10.14, *)) {
imageNamed = (void *)[self methodForSelector:@selector(imageNamed:)];
method_setImplementation(class_getClassMethod(self, @selector(imageNamed:)),
[self methodForSelector:@selector(imageNamedWithDark:)]);
}
}
@end